Senior Network Engineer
Location: GR, I, Athens
Department: Engineering
Employment type: Full-time
Required experience: Mid-Senior level
Required education: Unspecified
Industry: Telecommunications
Function: Engineering

Company profile:
Upstream’s mission is to revolutionise the way companies market to consumers through cutting edge technology. This is an opportunity to collaborate with like-minded people in an environment that embraces individual differences and diversity.We offer a challenging and stimulating environment in which employees have the opportunity to work on a vast range of complex projects at the forefront of technical innovation. We are looking for creative, enthusiastic and open-minded individuals to join our innovative team to help both drive our success and uphold our existing reputation within the marketing technology world.What we believeOur values of integrity, perseverance, innovation and respect are at the heart of our company. Our actions are underpinned by these four values, which have become central to Upstream, providing all of our employees with a clear framework from which to make their decisions.1. Integrity &amp; TrustYou are widely trusted and seen as a direct and truthful individual. You present the unvarnished truth in an appropriate and helpful manner, keeping confidences and admitting mistakes without misrepresenting themselves for personal gain.2. PerseveranceYou pursue work and life with energy, drive and a need to finish; you seldom give up before finishing, especially in the face of resistance or setbacks.3. InnovationYou have good judgement about which creative ideas and suggestions will work and a sense about managing the creative process of others. You have the ability to facilitate effective brainstorming and project how potential ideas may play out in the marketplace.4. RespectYou invest time in peers and demonstrates value and reverence for others when due, encouraging co-workers to express opinions and ideas. You promote equality within the workplace, encouraging praise and recognition from employee to employee as well as from the superiors. Professional Development at UpstreamUpstream offers a variety of resources and a range of opportunities to inspire the best possible performance from our employees. Our vast range of departments and global activities provide a strong platform for career development and professional progression. We boast various methods of progression within the company; whether through an upward advancement within a chosen field, expansion across departments or relocation to another office, creating the opportunity to gain both valuable experience and further insight into the international workings of the business. At Upstream, employees have the opportunity to learn new skills, work across different disciplines and global departments and move into new challenges, all within the same company.

Job description:
As a Network Engineer you will bring domain specific knowledge, skills, and best practices to a team of talented network professionals. You should be able to demonstrate your technical competency, perseverance, and logical systematic approach to maintaining mission critical local and wide area network infrastructures. Key Accountabilities  • The candidate should have strong analytical and communications skills, ability to present in front of an audience.• Demonstrated knowledge in Internet Protocol, Switching, Routing, optical and network Virtualisation, and large scale • LAN/WAN switching and routing implementations.• Proven experience in Network Architecture and Solution Design.• Knowledge in Cloud and Mobile Security Architecture.• Knowledge in Wireless Architecture Design.• Proven experience in Data center transformation.• Experience in cross-departmental projects.• Certified in CCDP and CCNP.

Requirements:
Design skillsGeneral Network Architecture• Hierarchical Models• Architectures for Services and Applications• Collapse-Core Model• Dual-Stack ModelData center Network Architecture• Leading architecture projects, such as Data Center and Enterprise Local Area Network (LAN) transformation covering:  • Data center interconnection technologies.  • Data replication and synchronization.  • Virtualization and Cloud Architecture focused on SDN (Software Defined Networks) and Openflow.  • Data segregation technologies.  • Network security technologies.  • Local and geographic load balancing technologies.Technical Skills• Implementation of Architecture designs, strong troubleshooting and optimization of network infrastructure.• Ability to lead a DR/BC plans.• Excellent knowledge of TCP/IP.• Excellent knowledge of Switching and Routing protocols (e.g. FHRP, OSPF, BGP, MPLS).• Proven experience in working on with Nexus family products (inc. VRFs, VDC, VPC), data center HA (inc. NSF, SSO) and Storage Area Networks (inc. FC Model).• Experience in working with network products from vendors, such as, HP and DELL (e.g. HP 5400 series and Force10 product line).• Experience in working with load balancing technologies (e.g. Cisco LB, F5 BIG-IP and GTM).• Excellent knowledge of monitoring systems and tools, e.g. Nagios, Cacti, OpenNMS, IP SLA, NBAR, ®SPAN.• Excellent knowledge in Firewall products (Cisco, Checkpoint, Juniper, Palo Alto).• Knowledge in IPS Systems (Cisco, Checkpoint).• Knowledge in VPN services (OpenVPN, IPSec VPN, RA VPN).• Knowledge in Firewalls policies, IPS, QoS, Virtual Firewalls, ZBF, ASR, SSO.• Knowledge in security monitoring tools (SIEM).• Knowledge in UNIX/Linux operating systems (e.g. Centos, RedHat, Windows).• Strong troubleshooting network skills.• Experience deploying or integrating solutions in various Authentication Schemes; e.g. LDAP, Radius, Kerberos.Additional Experience• Ability to organize technical and non-technical presentations for various audiences.• Certified in one or more of the following: CCIE, CCDE.

Benefits:
Includes attractive competitive base salary and benefits, working closely with a highly motivated team in a dynamic and fast paced environment that provides the opportunity for rapid career development.